JP2660825B2 - Elastic bearing device for cross girder bearing and method of installing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic bearing device for a cross beam which is installed in a direction perpendicular to the longitudinal direction (bridge axis direction) of a superstructure such as an automobile road (bridge axis direction) and its installation. It is about the method.

[0002]

2. Description of the Related Art Conventionally, as a rubber bearing device for supporting a cross beam arranged in a direction perpendicular to the direction of a bridge axis, one having a structure in which the amount of expansion and contraction of the cross beam is absorbed by shear deformation of a rubber layer in the rubber bearing device. Are known. When a horizontal force distribution type rubber bearing is used at the end of a cross girder installed in a direction perpendicular to the longitudinal direction of the bridge, the amount of expansion and contraction in the direction perpendicular to the bridge axis (longitudinal direction of the cross girder) is extremely large. It may be larger than the amount of expansion and contraction in the axial direction. Conventionally, rubber bearings have a structure that absorbs the amount of movement of the structure installed on the rubber layer by the shear deformation of the rubber layer.To always correct the amount of expansion and contraction due to temperature change, preliminary shear deformation must be applied to the rubber layer. Must. However, due to the structure of the rubber bearing, it is difficult to apply preliminary shearing deformation in the direction perpendicular to the bridge axis. Further, in the case of a cross beam, particularly a steel cross beam, there is a problem that it is very difficult to install the pier and the cross beam due to the expansion and contraction of the cross beam due to daily temperature changes and the movement of the cross beam due to camber, dead load and the like. Generally, the design is made with the direction perpendicular to the bridge axis fixed, but this may not be the case with independent columns (the piers in the direction perpendicular to the bridge axis become too large and difficult to design). Has invented an elastic bearing device for a horizontal girder bearing capable of adjusting the movement in the direction perpendicular to the bridge axis.

[0003]

In the conventional rubber bearing device, the amount of expansion and contraction of the cross beam is absorbed by the shear deformation of the rubber material. The shear deformation increased, and the rubber material in this state was further subjected to a strong horizontal force such as an earthquake.As a result, the rubber material became less cushioning, and the rubber layer in the rubber bearing device might be damaged. There is a problem of inefficiency.

[0004]

SUMMARY OF THE INVENTION In order to advantageously solve the above-mentioned problem, in a rubber bearing device for supporting a horizontal girder according to the present invention, a horizontal support of a lower support member 2 is provided above a pillar 1. The lower portion of the central support member 3 is fixed, and an elastic support 7 having an elastic plate 4 such as rubber, a lower metal support plate 5 and an upper metal support plate 6 is attached to the upper end of the horizontal central support member 3. An upper movable support member 9 is fixed to a lower portion of the cross beam 8 disposed above the elastic support member 7, and a slide plate 10 is provided between the elastic support member 7 and the upper movable support member 9.
The upper movable support member 9 is placed on the elastic support member 7 with the interposition of the upper support protrusion 9 integrally fixed to the upper metal support plate 6 in the downward opening groove 11 of the upper movable support member 9. The downwardly-opening groove 11
Is fitted to the upper support projection 12 so as to be movable in the longitudinal direction of the cross beam orthogonal to the horizontal axis direction. Further, in the rubber bearing device for supporting the horizontal girder according to the second aspect of the present invention, stoppers for restricting the movement of the horizontal upper movable supporting member 9 are provided on both sides of the horizontal central supporting member 3 in the longitudinal direction of the horizontal girder. A holding member 13 is provided, and a holding member 14 is fixed to the stopper / holding member 13 with bolts 15.
Are always connected to the end flange 1 continuously provided at both ends of the upper movable support member 9 in the longitudinal direction of the cross beam.
8 is located at the top. Further, in the method of installing the rubber bearing device for supporting the cross beam according to the third aspect of the present invention, the lower portion of the horizontal center support member 3 of the lower support member 2 is fixed to the upper portion of the pillar 1 to provide elasticity such as rubber. An elastic bearing 7 having a plate 4, a lower metal supporting plate 5, and an upper metal supporting plate 6 is fixed to the upper end of the horizontal center supporting member 3, and a sliding bearing 10 is interposed in the elastic bearing 7. Then, the upper movable support member 9 is placed, and the downward opening groove 11 of the upper movable support member 9 is moved in the longitudinal direction of the cross beam relative to the upper support protrusion 12 integrally fixed to the upper metal support plate 6. And then open its downwardly facing groove 11
After adjusting the relative position in the longitudinal direction of the cross beam orthogonal to the bridge axis direction with respect to the upper bearing protrusion 12 and holding it, and then fixing the cross beam 8 to the upper movable support member 9, The holding of the relative position with the upper bearing protrusion 12 in the longitudinal direction of the cross beam is released. Further, in the method for installing a rubber bearing device for cross beam support according to the invention of claim 4, the upper part of the pillar 1
The lower part of the horizontal center support member 3 in the lower support member 2 is fixed, and the elastic support body 7 including the elastic plate 4, the lower metal support plate 5, and the upper metal support plate 6 is fixed to the horizontal center support member 3.
Is fixed to the upper end of the elastic support body 7 and slides on the elastic support body 7.
The upper movable supporting member 9 is placed with the interposition of the upper movable supporting member 9, and the downward opening groove 11 in the upper movable supporting member 9 is aligned with the upper bearing protrusion 12 integrally fixed to the upper metal supporting plate 6 in the bridge axis direction. It is fitted movably in the longitudinal direction of the cross beam and immovable in the direction perpendicular thereto, and its downward opening groove 11 is positioned relative to the upper support projection 12 in the longitudinal direction of the cross beam perpendicular to the bridge axis direction. Is adjusted and held, and then, after the cross beam 8 is erected and fixed to the upper movable support member 9, the holding of the relative position of the downward opening groove 11 and the upper support projection 12 in the cross beam longitudinal direction is released.

[0005]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; FIGS. 1 to 11 show an embodiment of the first and second aspects of the present invention. As shown in FIGS. 10 and 11, square steel pipe bodies 39 are provided on both sides of a river or a road in the front-rear direction. The square steel pipe main body 39 is fixed to the foundation concrete 42 at a lower portion of each square steel pipe main body 39.
Is filled with reinforced concrete 38 to form the pillar 1.

A lower portion of a horizontal center support member 3 of a steel lower support member 2 is fixed to an upper portion of the pillar 1, and a protrusion 2 extending in the front-rear direction is provided at a lower portion of the center support member 3.
4 and a ridge 24 extending in the left-right direction are integrally provided, and an upper portion of a large number of anchor members 23 is welded or screwed to a lower portion of the horizontal central support member 3. A stopper / holding member 13 for restricting horizontal movement of the steel upper movable support member 9 is integrally provided on both sides in the longitudinal direction of the girder (the left-right direction in FIG. 1),
The horizontal central support member 3 integrally provided with the anchor member 23 and the respective ridges 24 is a horizontal reinforcing bar (not shown) on the upper portion of the pillar 1 and a vertical reinforcing bar (not shown) having a horizontal portion. It is embedded and fixed integrally with the reinforced concrete 38 provided.

A lower metal support plate 5 and an upper metal support plate 6 are integrally laminated and fixed to the lower and upper surfaces of an elastic plate 4 made of an elastic material such as rubber, respectively. The lower metal supporting plate 5 is integrally provided with a lower locking projection 20 having a rectangular cross section and projecting downward at a central portion of a lower surface of the lower metal supporting plate 5. The elastic support 7 is placed on the upper surface of the horizontal center support member 3, and the lower engaging protrusion 20 is fitted into the engaging recess 21 so as not to be rotatable. By being locked, the elastic bearing body 7 is fixed to the lower support member 2.

At the center of the upper surface of the upper metal support plate 6,
An upwardly protruding upper support projection 12 having a substantially rectangular cross section is integrally provided, and a sliding support plate 10 made of a synthetic resin plate such as ethylene tetrafluoride is simply fitted and mounted on the upper surface of the elastic support body 7. A central through-hole in the sliding bearing plate 10 is fixed to the upper bearing projection 12 by an adhesive or the like.

At the upper center of the upper movable support member main body 26,
It has a support projection 25 with a non-circular cross section and on the lower surface,
An upper movable support member 9 having a downward opening groove 11 having a substantially rectangular cross section is mounted on the upper surface of the sliding support plate 10, and a downward opening groove 11 in the upper movable support member 9 is connected to an upper support in the elastic support body 7. A gap is provided on both left and right sides of the downward opening groove 11 in which the upper support projection 12 is fitted so as to be movable with respect to the projection 12 in the longitudinal direction of the cross beam (left and right direction) and immovable in the longitudinal direction. L is provided.

That is, between the longitudinally inner surface of the transverse girder in the downwardly opening groove 11 of the upper movable support member 9 and the longitudinally outer surface of the transverse girder of the upper support projection 12 integrally fixed to the upper metal support plate 6. When the upper movable support member 9 is at the neutral position, as shown in FIG. 1, the gap L is a gap having the same distance on both sides in the longitudinal direction of the cross beam. . That is, the left and right gap L
Is a gap in which the expansion and contraction of the steel cross beam 8 due to a temperature change and the like can be allowed, and even if the upper movable support member 9 fixed thereto slides due to expansion and contraction of the steel cross beam 8 in this allowable gap. Since the steel cross beam 8 and the upper structure 49 erected thereon can be supported without shearing the elastic plate 4, that is, the rubber layer, of the elastic support member 7, when a horizontal force acts during an earthquake. In addition, the buffer function of the elastic plate 4 is not reduced by the expansion and contraction of the steel cross beam 8.

[0011] Further, at the middle part in the front-rear direction on both sides of the upper movable support member 9 in the longitudinal direction (lateral direction) of the cross beam,
A vertical step wall portion 22 is provided, and an end flange 18 having a flat upper surface connected to the vertical step wall portion 22 is provided, and a stopper arm piece 27 is provided on an end side of the end flange 18 in the front-rear direction. The upper surface of the end flange 18 is disposed at substantially the same level as the upper surface of the stopper / holding member 13.

A longitudinal gap L ₁ between the vertical step wall portion 22 and the end of the horizontal portion 17 of the holding member 14, and a horizontal beam between the end face of the end flange 18 and the stopper / holding member 13. longitudinal gap L ₂ is set to the total size of the upper movable (deformation amount of crossbeams 8) movable width of the support member 9 and the shear deformation allowance of the elastic plate 4 earthquake or the like. The length of the upper movable support member 9 in the longitudinal direction of the cross beam is longer than the elastic bearing member 7 by the amount of expansion and contraction of the cross beam. On the upper surface of the upper movable support member 9, a steel intermediate support member 19 having a locking hole 28 in the center and a bolt insertion through-hole 30 with a gap around the locking hole 28. Is mounted on the upper surface of the intermediate support member 19, one end of the steel cross beam 8 is mounted, and the bolt insertion through hole 30 and the intermediate portion provided in the lower flange 19 of the steel cross beam 8 are mounted. It is screwed and fixed to the screw hole 53 of the upper movable support member 9 by a cross girder mounting bolt 32 inserted through the through hole 31 of the support member 19 (see FIG. 6). The intermediate supporting member 19 may be fixed to the lower surface of the cross beam 8 by welding or bolts in advance.

On the upper surface of each stopper / holding member 13,
The horizontal portion 17 of the inverted L-shaped steel pressing member 14 is placed, and the vertical portion 16 of the pressing member 14 is inserted into the through hole 51 provided in the vertical portion 16 and the stopper / holding member 13 is provided. Is fixed to the stopper / holding member 13 by a bolt 15 screwed into the female screw hole 52,
The lower surface of the horizontal portion 17 of the inverted L-shaped pressing member 14 is always in contact with the upper surface of an end flange 18 provided at both ends of the upper movable support member 9 in the longitudinal direction of the horizontal girder. It is arranged to be located at.

FIGS. 12 and 13 show the case where the cross beam 8 is extended to the outer end side in the longitudinal direction of the cross beam to the maximum. Also in this case, the inverted L-shaped pressing member 14 is also used.
Is located above the end flange 18 of the upper movable support member 9 and during an earthquake,
Even if the elastic plate 4 is subjected to shear deformation until the upper movable support member 9 comes into contact with the stopper / holding member 13, the horizontal portion 17 is placed on the upper portion of the end flange 18 in a state of being overlapped with the end flange 18. Located at the top of.

FIGS. 14 and 15 show an example in which a sliding guide member 33 made of a stainless steel plate is fixed to the lower surface of the upper movable support member 9 with a set screw or the like.
By providing the slide guide member 33 in this manner, the upper movable support member 9 can easily slide.

FIGS. 16 to 30 show an embodiment of the third and fourth aspects of the present invention, wherein the downwardly opening groove 11 in the upper movable support member 9 is
FIG. 9 shows an example of a case in which the installation is performed by moving (deviation) relatively in advance with respect to, that is, a case where the installation is performed in a temperature-corrected state in consideration of expansion and contraction due to a temperature when the cross beam 8 is installed. As shown in FIG. 16, a longitudinal portion 35 of a steel L-shaped adjuster support member 34 is arranged and fixed on both front and rear sides of the stopper / holding member 13, and a horizontal portion of each adjuster support member 34. The upper surface of the upper movable support member 9 is arranged at substantially the same level as the lower surface of the end flange 18 of the upper movable support member 9, and one end of each adjuster support member 34 in the longitudinal direction of the cross beam projects toward the upper movable support member 9. Is attached to the stopper / holding member 13 in a state of being displaced. That is, the vertical portion 35 of the adjuster support member 34 is inserted into a plurality of horizontally long holes 37 provided therein, and a fixing tool 43 formed of a butterfly bolt screwed into a female screw hole 38 of the stopper / holding member 13. 17, an adjuster 40 made of an unequal thickness L-shaped steel is placed on the upper surface of the lateral portion 36 of the adjuster support member 34, as shown in FIG.
The adjuster 40 is provided with an elongated hole 41 extending in the front-rear direction. The adjuster 40 is inserted into the elongated hole 41 and is fixed to a vertical female screw hole 42 of the adjuster 40 by a fixing tool 44 formed of a wing bolt. The adjuster support member 34
And one of the spacing adjusting arms 45 in each of the steel adjusters 40 abuts on the inner surface end of the stopper / holding member 13 in the longitudinal direction of the cross beam, and the end flange of the upper movable support member 9. 18 and the other jack engaging arm 46 of each steel adjuster 40 is connected to the stopper / holding member 13.
Are arranged so as to face a front end face or a rear end face in a direction (front-back direction) orthogonal to the longitudinal direction of the cross beam at a predetermined interval.

If necessary, one or more gap adjusting shim plates 4 are provided between the gap adjusting arm 45 of each steel adjuster 40 and the side end surface of the end flange 18.
The gap adjusting shim plate 47 is fixed to the end flange 18 with a hexagon socket head bolt 48 as shown in FIG. 29, for example, or as shown in FIG. It is attached to the gap adjusting arm piece 45 of the adjuster 40 by a screw or the like. FIG. 22 shows that the adjuster support member 34, the adjuster 40, and the gap adjusting shim plate 47 are provided on both front and rear sides of the left and right stopper / holding member 13, and the downward opening groove 11 in the upper movable support member 9 is provided.
Shows a state in which the relative position in the longitudinal direction of the cross beam is adjusted and held with respect to the upper bearing protrusion 12. Next, as shown in FIGS. 23 and 24, after the steel cross beam 8 is erected and attached to the upper movable support member 9 by the cross beam attachment bolt 32, the steel cross beam 8 is attached to the upper part of an automobile road or the like. A structure 49 is erected or built.

Next, after the cross beam 8 or the upper structure 49 installed on the cross beam 8 is installed, the vertical female screw hole 4 of the steel adjuster 40 is formed.
Then, as shown in FIG. 28, the fixing tool 44 made of a wing bolt screwed into the connector 2 is removed, and then, as shown in FIG. Between the hydraulic jack 50
Place. Next, the hydraulic jack 50 is extended, and the steel adjusters 40 and the gap adjusting shim plates 47 are pulled out or removed, and the relative positions of the downward opening grooves 11 and the upper bearing protrusions 12 in the longitudinal direction of the cross beam are increased. Release the hold,
Subsequently, after the fixing tool 43 made of a wing bolt is removed and the adjuster support member 34 is removed, the stopper / holding member 1 is removed.
A rust-proof treatment is performed on the horizontal female screw hole 38 of No. 3. When removing the hydraulic jack 50, after the cross beam 8 is erected, a portion where an external force is acting on the adjuster due to temperature expansion and contraction of the cross beam 8 and a portion where no external force is acting. However, the adjuster 40 at a position where no external force is applied can be manually removed without having to pull out the adjuster 40 through the hydraulic jack 50. As described above, by removing the adjuster 40 and the adjuster support member 34 and performing a rustproofing process, the installation of the horizontal girder support device is completed. That is, in response to expansion and contraction of the steel cross beam 8 due to a temperature change or the like, the upper movable support member 9 is free to move, and the elastic support function of the rubber-like elastic plate (layer) 4 is applied to horizontal force due to an earthquake or the like. Can be demonstrated.

As described above, the downward opening groove 1 in the upper movable support member 9 when the cross beam 8 is extended to the maximum.
12 and 1 showing the relationship between the first bearing 1 and the upper bearing projection 12.
In the case of 3, the downward opening groove 11 in the upper movable support member 9 moves to the end side in the longitudinal direction of the horizontal girder with respect to the upper support protrusion 12, and when the horizontal girder 8 is shortened, the upper movable support member 9 The downward opening groove 11 in the upper bearing protrusion 12
On the other hand, it is moved to the center side in the longitudinal direction of the cross beam (not shown).

In practicing the present invention, the upper bearing projection 12
May be a circular cross section, and the cross section of the downward opening groove 11 may be an oval. Further, when the present invention is implemented, the cross-sectional shapes of the locking hole 28 and the supporting projection 25 may be circular.

[0021]

According to the first aspect of the present invention, even if the cross beam 8 expands and contracts due to daily temperature changes, the elastic plate 4 of the elastic bearing member 7 is not subjected to shear deformation in the longitudinal direction of the cross beam. The elastic plate 4 has a good cushioning property even when a horizontal force such as an earthquake is applied, and there is no possibility of damaging the elastic bearing device. Moreover, the cushioning efficiency is high and the structure is simple. Further, even if a strong horizontal force acts, the cross beam can be supported in a buffered state without exerting a strong supporting force. According to the second aspect of the present invention, even if the upper movable support member 9 slides due to expansion and contraction of the cross beam 8, it is possible to reliably prevent the end flange 18 from coming off the horizontal portion 17 of the holding member 14. Can be. According to the third or fourth aspect of the present invention, the elastic bearing device can be installed in a state where expansion and contraction due to a temperature change in the longitudinal direction of the cross beam 8 is corrected in advance, and the elastic plate in the elastic bearing body 7 can be installed. The elastic bearing device can be installed without shear deformation of the cross beam 4 in the longitudinal direction of the cross beam.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing an elastic bearing device for a horizontal girder bearing according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a sectional view taken along line CC of FIG. 1;

FIG. 5 is a sectional view taken along line DD of FIG. 1;

FIG. 6 is an enlarged sectional view showing a part of FIG. 1;

FIG. 7 is a sectional view taken along line EE of FIG. 1;

FIG. 8 is a partial longitudinal side view showing an elastic bearing device for horizontal girder bearing according to the first embodiment of the present invention.

FIG. 9 is a partially longitudinal front view showing an elastic bearing device for a horizontal girder bearing according to the first embodiment of the present invention.

FIG. 10 is a plan view showing a state in which an upper structure such as an automobile road has been built in the elastic bearing device for cross beams supporting according to the embodiment of the first invention.

FIG. 11 is a vertical sectional front view showing a state in which an upper structure such as an automobile road is built on the elastic bearing device for horizontal beam support according to the embodiment of the first invention.

FIG. 12 is a vertical cross-sectional side view showing a state in which a horizontal girder is extended and a downward opening groove is moved together with an upper movable support member.

FIG. 13 is a sectional view taken along line FF of FIG. 12;

FIG. 14 is a vertical sectional side view showing an example in which a sliding bearing is provided on the lower surface of an upper movable support member.

FIG. 15 is a sectional view taken along line GG of FIG. 14;

FIG. 16 is a partial cross-sectional plan view showing a state where an adjuster support member is attached to a stopper / holding member.

FIG. 17 is a partial cross-sectional plan view showing a state where an adjuster is mounted on an adjuster support member and a shim plate is provided.

FIG. 18 is a partially longitudinal side view showing a state in which the upper movable support member is immovably held with respect to the upper support projection of the upper metal support plate.

FIG. 19 is a sectional view taken along line HH of FIG. 18;

20 is a partially longitudinal front view showing a part of FIG. 19 in an enlarged manner.

FIG. 21 is a partially longitudinal side view showing a state in which an upper movable support member is immovably held with respect to an upper support projection of an upper metal support plate.

FIG. 22 is a sectional view taken along line II of FIG. 21;

FIG. 23 is a partially longitudinal side view showing a state in which a cross beam is erected and fixed to an upper movable support member that has been adjusted and held.

FIG. 24 is a partial vertical front view of a portion shown in FIG. 23;

FIG. 25 is a perspective view showing an adjuster support member.

FIG. 26 is a plan view of the adjuster.

FIG. 27 is a sectional view taken along line JJ of FIG. 26.

FIG. 28 is a partial cross-sectional plan view showing a state in which a hydraulic jack for pulling out an adjuster is disposed between a stopper / holding member and an adjuster.

FIG. 29 is a partial cross-sectional plan view showing a part of FIG. 28 in an enlarged manner.

FIG. 30 is a partial cross-sectional plan view showing a state where the hydraulic jack is extended and the adjuster is pulled out.

FIG. 31 is a cross-sectional plan view showing another mounting example of the shim plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pillar 2 Lower support member 3 Horizontal center support member 4 Elastic plate 5 Lower metal support plate 6 Upper metal support plate 7 Elastic support 8 Cross beam 9 Upper movable support member 10 Sliding support plate 11 Downward opening groove 12 Upper support protrusion DESCRIPTION OF SYMBOLS 13 Stopper and holding member 14 Inverted L-shaped pressing member 15 Bolt 16 Vertical portion 17 Horizontal portion 18 End flange 19 Intermediate support member 20 Lower locking projection 21 Non-circular cross-section locking recess 22 Vertical wall portion 23 Anchor member 24 Protrusion 25 Non-circular cross section support projection 26 Upper movable support member main body 27 Stopper arm 28 Locking hole 29 Lower flange 30 Bolt insertion through hole 31 Bolt insertion through hole 32 Cross beam mounting bolt 33 Slip Guide member 34 Adjuster support member 35 Vertical part 36 Horizontal part 37 Horizontal elongated hole 38 Female screw hole 39 Square steel pipe main body 40 Steel screw Caster 41 Long hole 42 Vertical female screw hole 43 Fixing tool 44 Fixing tool 45 Gap adjusting arm piece 46 Jack engaging arm piece 47 Gap 48 Hexagon socket head cap bolt 49 Upper structure 50 Hydraulic jack 51 Through hole 52 Female screw hole 53 Female screw hole

Claims (4)

(57) [Claims] 1. A lower portion of a horizontal center support member 3 of a lower support member 2 is fixed to an upper portion of a pillar 1, and an elastic plate 4, such as rubber, a lower metal support plate 5, and an upper metal support plate 6 are fixed. An elastic bearing member 7 provided is fixed to an upper end portion of the horizontal central support member 3, and an upper movable support member 9 is fixed to a lower portion of a cross beam 8 disposed above the upper metal support plate 6. A sliding support plate 10 is interposed between the elastic support 7 and the upper movable support member 9 to move the upper movable support 9 to the elastic support 7.
And an upper support projection 12 integrally fixed to the upper metal support plate 6 is fitted into a downward opening groove 11 of the upper movable support member 9, and the lower opening groove 11 is inserted into the upper support projection 9. An elastic bearing device for supporting a horizontal girder, which is movably fitted to 12 in a longitudinal direction of a horizontal girder orthogonal to the bridge axis direction. 2. A stopper / holding member 13 for restricting the movement of the horizontal upper movable supporting member 9 is provided on both sides of the horizontal center supporting member 3 in the longitudinal direction of the horizontal girder. The holding member 14 is fixed by bolts 15, and the horizontal portion 17 of the holding member 14 is
2. An elastic bearing device for supporting a horizontal girder according to claim 1, wherein said elastic supporting device is always located above an end flange connected to both ends of said upper movable support member in a longitudinal direction of said horizontal girder. 3. A lower part of the horizontal center support member 3 of the lower support member 2 is fixed to an upper part of the pillar 1, and an elastic plate 4, such as rubber, a lower metal support plate 5, and an upper metal support plate 6 are fixed. An elastic bearing 7 provided is fixed to the upper end of the horizontal center support member 3 and a sliding bearing plate 1 is mounted on the upper surface of the elastic bearing 7.
The upper movable support member 9 is placed on the upper movable support member 9 with the downward opening groove 11 of the upper movable support member 9 interposed therebetween.
, So that the downward opening groove 11 is adjusted and held in the longitudinal direction of the cross beam orthogonal to the bridge axis direction with respect to the upper support projection 12. A method of installing an elastic bearing device for supporting a horizontal girder, which releases the holding of the relative position of the downward opening groove 11 and the upper support protrusion 12 in the horizontal direction of the horizontal girder after the bridge 8 is fixedly mounted on the upper movable support member 9. 4. A lower portion of the horizontal center support member 3 of the lower support member 2 is fixed to an upper portion of the pillar 1, and an elastic plate 4, such as rubber, a lower metal support plate 5, and an upper metal support plate 6 are fixed. An elastic bearing 7 provided is fixed to the upper end of the horizontal center support member 3 and a sliding bearing plate 1 is mounted on the upper surface of the elastic bearing 7.
The upper movable support member 9 is placed on the upper movable support member 9 with the downward opening groove 11 of the upper movable support member 9 interposed therebetween.
Movably in the longitudinal direction of the cross beam and immovably in the direction perpendicular thereto, and then the downward opening groove 11 is positioned relative to the upper support projection 12 in the longitudinal direction of the cross beam perpendicular to the bridge axis direction. Is adjusted and held, and then the cross beam 8 is erected and fixed to the upper movable support member 9, and then the downward opening groove 1 is
A method of installing an elastic bearing device for supporting a cross beam, which releases the holding of the relative position between the upper beam protrusion 1 and the upper bearing protrusion 12 in the longitudinal direction.